Testable, fault-tolerant power interface circuit for normally de

Details Testable, fault-tolerant power interface circuit for normally de Testable, fault-tolerant power interface circuit for normally de

1985-10-31

1987-07-28

Cangialosi, Salvatore

Induced nuclear reactions: processes, systems, and elements

Testing, sensing, measuring, or detecting a fission reactor...

By particular instrumentation circuitry

376215, 324415, 371 20, 371 22, 371 36, G21C 1700

Patent

active

046831053

ABSTRACT:
A power interface circuit for normally deenergized loads includes the capability to test the operation and connections thereof without any possibility of accidental activation of the load. Three input signals may be received by the power interface circuit which supplies power to a load if two out of three of the input signals indicates activation of the load. A normally closed switch which ordinarily provides power directly to the voter is opened during testing so that the voter is supplied with a reduced power that is insufficient to activate the load. The normally closed switch is closed if any of the input signals indicate activation of the load. Current sensors are included in the power interface circuit to detect all possible logic combinations for activating the load and to detect the operation of the normally closed switch.

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